Tip assembly for syringes

Claim 2

A tip assembly comprising: a cylindrical main body, said main body having an open forward end and a partially closed back end, the inner surface of the main body adjacent the back end having a pair of spaced annular sealing rings extending inwardly therefrom, an inner body positioned within the main body forwardly of the sealing rings, the outer surface of the inner body being equispaced from the inner surface of the main body, the inner surface of the inner body being hexagonal, means connecting the inner body to the main body and retaining same in the aforesaid spaced relation, the forward end of the main body being provided with a retaining groove, a cap fitting over the open end of the main body, said cap having a cup-shaped configuration including a bottom and a cylindrical wall extending therefrom, holding means on the outer surface of the cap wall to engage the retaining groove in the main body, a plurality of spacing bars on the outer surface of the cap wall generally perpendicular to the cap bottom, the length of said spacing bars being such that they abut the forward edge of the main body when the cap is positioned on the main body and the holding means are seated in the retaining groove, and a needle assembly carried within the main body by the inner body, said needle assembly comprising a hub member having an enlarged rear portion, a hexagonally shaped middle portion and a forward portion having a cross section smaller than the middle portion, the hub having a hole extending completely therethrough, a needle positioned in the forward portion of the hub and held therein by the swaging of said hub portion into firm engagement with the needle, the hexagonal middle portion of the hub being sized to snugly fit into the hexagonal inner surface of the inner body whereby the needle assembly is firmly held in position within the main body

Claim 3

A tip assembly adapted for use in conjunction with a medicament container from which the medicaments are removed by a needle wherein the dispensing end of the container has a body portion from which extends an outer sleeve having its inner surface threaded, and an inner sleeve also extending forwardly from said body, the inner sleeve being positioned within and spaced from the outer sleeve, said inner sleeve being tapered so as to enlarge in the direction of the body and in communication with the medicament in the container, said tip assembly comprising: a cylindrical main body, said main body having an open forward end and a partially closed back end, the inner surface of the main body adjacent the back end having circumferential sealing means extending inwardly therefrom, said sealing means being adapted to sealingly engage the outer surface of the outer sleeve on the medicament container when the tip assembly is operatively connected to said container, an inner cylindrical body within and coaxial with the main body forwardly of the sealing means, means connecting the inner body to the main body to retain the aforesaid spaced relation, the inner surface of the inner body being hexagonal in cross section, a cap fitting over the open end of the main body, said cap having a cup-shaped configuration including a bottom and a cylindrical wall extending therefrom, cooperating retaining means on the outer surface of the cap waLl and the inner surface of the main body to hold the cap on the main body, a needle assembly carried within the main body by the inner body, said needle assembly comprising a hub member having an enlarged rear portion adapted to engage the threads on the inner surface of the outer sleeve of the container, a hexagonally shaped middle portion and a forward portion of smaller diameter than the middle portion, the hub having a hole extending completely therethrough, a needle fixedly mounted in the forward portion of the hub, the rearward portion of the hub hole being sized to conformingly engage the tapered inner sleeve of the container, the hexagonal portion of the hub being sized to operatively fit into the hexagonal inner surface of the inner body whereby the needle assembly is firmly held in position within the main body, and whereby when the tip assembly is operatively mounted on the dispensing end of the container all of the components of the tip assembly remain in fixed position during use except for the cap which is removed to expose the needle prior to use.

Claim 4

A tip assembly adapted for use in conjunction with a medicament container from which the medicaments are removed by a needle wherein the dispensing end of the container has a body portion from which extends an outer sleeve having its inner surface threaded, and an inner sleeve also extending forwardly from said body, the inner sleeve being positioned within and spaced from the outer sleeve, said inner sleeve being tapered so as to enlarge in the direction of the body and in communication with the medicament in the container, said tip assembly comprising: a cylindrical main body, said main body having an open forward end and a partially closed back end, the inner surface of the main body adjacent the back end having circumferential sealing means extending inwardly therefrom, said sealing means being adapted to sealingly engage the outer surface of the outer sleeve on the medicament container when the tip assembly is operatively connected to said container, an inner cylindrical body within and coaxial with the main body forwardly of the sealing means, means connecting the inner body to the main body to retain the aforesaid spaced relation, the inner surface of the inner body being hexagonal in cross section, a cap fitting over the open end of the main body, said cap having a cup-shaped configuration including a bottom and a cylindrical wall extending therefrom, cooperating retaining means on the outer surface of the cap waLl and the inner surface of the main body to hold the cap on the main body, a needle assembly carried within the main body by the inner body, said needle assembly comprising a hub member having an enlarged rear portion adapted to engage the threads on the inner surface of the outer sleeve of the container, a hexagonally shaped middle portion and a forward portion of smaller diameter than the middle portion, the hub having a hole extending completely therethrough, a needle fixedly mounted in the forward portion of the hub, the rearward portion of the hub hole being sized to conformingly engage the tapered inner sleeve of the container, the hexagonal portion of the hub being sized to operatively fit into the hexagonal inner surface of the inner body whereby the needle assembly is firmly held in position within the main body, and whereby when the tip assembly is operatively mounted on the dispensing end of the container all of the components of the tip assembly remain in fixed position during use except for the cap which is removed to expose the needle prior to use.